I am still very new to OpenFOAM. Currently I'm using OpenFOAM 2.2.2 and I've finished doing all of the tutorials given in the user guide. I want to model a basic data center configuration. My supervisor recommended me to base my model on the "hotRoom" tutorial using buoyantBoussinesqSimpleFoam as the solver.

Initially, I had been able to run the simulation smoothly using just natural convection. Now, I incorporate some cool air raised from the floor in order to introduce forced convection cooling to the room. I met no problem when generating the mesh, but I got problems when I run the code. I have tried to fix it a lot of times, but still end up with the same error messages as follow.

I have no idea on what is going on. One thing I notice is the very very huge time step continuity errors, and I know that there must be something wrong in my code. However, I have no more idea on how to fix this problem.

Could anybody please help me?? I have attached several files which I think are the main cause of the error.

Thanks for your reply. Yes, I have employed mass continuity equation for the air velocity at inlets and outlets. I set the inlets and outlets to a particular temperature, so that I can determine the density variation and hence the velocity for each of them (the area for inlets and outlets are equal in magnitude). However, I rounded up the value up to 4 significant figures. Does it affect the result and causing error?

I have no idea on what is going on. One thing I notice is the very very huge time step continuity errors, and I know that there must be something wrong in my code. However, I have no more idea on how to fix this problem.

Could anybody please help me?? I have attached several files which I think are the main cause of the error.

Kind regards,

Steven

Hi Steven ,

Did you manage to get a solution to your problem of high time step errors, I am also facing the same errors.

Yes, finally I was able to solve the problem. If I'm not mistaken, I either put wrong boundary conditions or several boundary conditions did not suit well to the case I was simulating. However, Anton's suggestion about mass continuity also plays important role to make sure small continuity error.

What are you simulating? Maybe just put more detail about your case since it's hard to guess what's going on just from your post.